see [1]}. Jerald Kovacic developed in 1986 an algorithm to solve explicitly second-order differential equations with rational coefficients given in the form of equation (REF ), see [2]}. In [3]} another version of Kovacic's algorithm is presented, and it is applied to solve several second-order differential equations with special functions as solutions. The version of Kovacic's algorithm presented here corresponds to [4]}, see also [5]}, [1]}, [7]}, [8]}.
